Lightfoot, J. B., J. R. Harmer, edited and revised by Michael W. Holmes. The Apostolic Fathers. 2nd edition. Baker Book House. 1989.
This is the primary source used in this survey for the Apostolic Fathers.
The first edition was published in London in 1891.

Metzger, Bruce M. The Canon of the New Testament: Its Origin, Development, and Significance. Clarendon Press. Oxford. 1987.
This is the most copied book by far in this survey. Metzger is easy to read and the book is packed with small and interesting details. Highly recommended.

Richardson, C. C. ed. Early Christian Fathers. Philadelphia. Westminster. 1953. reprinted Macmillan 1970.
This book has all the Apostolic Fathers except Epistle of Barnabas, Shepherd of Hermas, and Fragments of Papias.
However, it includes First Apology by Justin Martyr, A Plea Regarding Christians by Athenagoras,
and books 1,3,5 of Adversus Haereses by Irenaeus.

Schneemelcher, Wilhelm, ed. New Testament Apocrypha, 6th edition. 2 Vols. Westminster/John Knox Press. Louisville. 1989.
This revised edition is a translation of the fifth German edition, and the largest collection of the latest in scholarly research. It includes English translations of most apocryphal writings. Highly recommended.
The Apostolic Fathers are not included.